Unveiling the crucial role of soil microorganisms in carbon cycling: a review
is subject to confounding by calendar-time (SOC evolved rapidly early in the pandemic, the linear covariate does not reflect non-linear SOC changes and hospital specific effects), hospital type (non-treatment hospitals were tertiary university centers), confounding by indication (4/7 hospitals initiated treatment on deterioration), immortal-time bias for as-treated (exposure assigned after baseline), significant differences for other experimental treatments, potential overadjustment from collider bias (steroid use and indication bias), limited baseline severity information, differences in hospice referral propensity across hospitals, unadjusted difference in time from onset to admission, difference in PCR positivity, and other factors
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NAFLD appears to be more frequent in industrialized countries, its global prevalence is about 25% and varies across different geographical areas, being higher in Middle East and South America and lower in Africa (33)
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